Transmission housing assembly



FIG. 1 is a front perspective view of a transmission housing assembly;

FIG. 2 is a front planar view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines in FIGS. 8-14 are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a transmission housing assembly, as shown and described. 